OMAPL138如何在Linux下使用EDMA3驱动

yyj

% U% _* m) h% t, }3 ^3 e7 w

1. [code]EDMA sample test application
   . N( U/ @, \; c7 z, ~! Y
2. /*
   2 X0 ?3 X( k  r- i) B6 f- C4 M
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   5 l9 ~5 W4 p' n1 h$ e
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   / ]" Q" @, l0 m3 j. i, i* q' b
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    5 b; g2 E4 ?7 G; X
11. *         TO CHANGE.
    ! d/ c1 M9 l& I: t' Z6 h
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    " n) ^1 \/ ?) a+ R
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      R0 D% f( E$ I# m* E3 d. k- \
22. * GNU General Public License for more details.
    9 B$ ?1 V' L4 P' h' I
23. */
    ; A2 d5 C7 T, l0 A
24. 
    9 H8 x0 O, q" }5 U
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 `5 ?. |& o" [4 h5 u9 A. b# M
27. #include <linux/errno.h>
    ( K8 C+ F8 L! E- h8 d% P! i9 U
28. #include <linux/types.h>
    # g, o4 e( C, ~0 [; |
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    2 S+ D% D6 F( C# o+ S
33. #include <linux/mm.h>
    * u7 M3 h1 z, O' m7 n
34. #include <linux/dma-mapping.h>
    6 q* H) A% q4 f
35. 
    5 l$ U6 j; X. C0 F, e/ @
36. #include <mach/memory.h>
    6 ]- i2 f  z( H: U3 u* {4 c
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    % t# T1 p" @+ r- k) |7 i
39. #include <asm/hardware/edma.h>
    
40. 
    & B' T5 i6 G* P' D) [, e$ x2 C3 N! V
41. #undef EDMA3_DEBUG
    4 h/ `) p+ h' u  u0 H3 z
42. /*#define EDMA3_DEBUG*/
    8 r5 y* ]5 H+ @  v: W# c
43. 
    
44. #ifdef EDMA3_DEBUG
      P0 S3 a$ r* p1 \
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' X7 j" y* U5 k  i
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' n3 K4 a5 G7 [3 ]
48. #else
    , r* X$ _' h1 z) Y. N* E& y
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ( f1 \: L- q9 G/ y% Z
51. #define DMA_FN_OUT
    " y; m( _, L3 {- f/ U) {, V
52. #endif
    
53. 
    . b9 z3 R! {/ g& C) `$ b
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    $ }% V+ X$ Y2 [8 u7 _/ f" {! s+ U
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    # k! U9 @- k( ~; I3 k, v) o  v' V
62. static volatile int irqraised2 = 0;
    ; n& D! c" S7 P4 B8 ~8 Y4 d. U
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 B: R' J; V1 b$ c9 \4 x7 K. j( d
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ' R- M# D; J$ |* C) D; Y
70. dma_addr_t dmaphysdest1 = 0;
    ! Y) P% ?  [% ~1 t/ @% M
71. dma_addr_t dmaphysdest2 = 0;
    ! P; ]9 v( p8 x( A
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    3 J; W2 u' c) Y! J% o
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    * D1 r1 H) I2 R
79. static int bcnt = 8;
    ( L) s: |. Q& t: |/ `: W$ o
80. static int ccnt = 8;
    4 i3 |) i7 E) M: n2 f  J
81. 
      M% Z, k5 p: H  w
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

, B5 b7 ^0 }4 b' f
      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  \4 S; f+ u" q1 B  M